rsp
I'm trying to create SpatialPoints objetcs from data frame on R
natFPV <- SpatialPointsDataFrame(coords = coordinates(natFPv.per_data[,c(27,28)]),data = natFPv.per_data[,-c(27,28)])
natFPV <- SpatialPoints(coords = coordinates(natFPv.per_data[,c(27,28)]))
But getting the error for both:
Warning: Error in SpatialPoints: could not find function "SpatialPoints"
I'm really don't konw how to deal it.
Use spTransform to transform the coordinates to WGS84:
library("rgdal")
library("rgeos")
map <- readOGR(".", "kommuner1983")
map_wgs84 <- spTransform(map, CRS("+proj=longlat +datum=WGS84"))
plot(map_wgs84, axes=TRUE)
gCentroid(map_wgs84)
# SpatialPoints:
# x y
# 1 10.05 55.96
# Coordinate Reference System (CRS) arguments: +proj=longlat +datum=WGS84
# +ellps=WGS84 +towgs84=0,0,0
rgdal::readOGR is capable to read the projection information automatically.
maptools functions neither read nor write projection information, leaving it up to you to manage these details manually.
Rather than this images you should provide some data. You can make SpatialLines with spLines in raster
library(raster)
?spLines
But the points need to be ordered correctly, and if they are not, it may be difficult to get them in the right order.
To get a SpatialLines object from your SpatialCollection do
x <- p3@lineobj
plot(x,add=T,col="blue",lwd=3)
Best Answer
You need to load the library with:
You need to do this once in each session, unless you customize your environment to automatically load it each time